Wheel puller of the combination impact and compressor type



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- Application filed amber 21, 1930 Serial ire-490,247. I

' This invention relates generally to a device cylindrical chamber and the piston is pre-v or removing'wheels, gears or the like from vided withthe usual seal orpacking to mainan axle or shaft on which the same may be tain the pressure and to prevent-the escape v mounted. The invention relates moreparticof the liquid medium which may be oil, water. ularly to a;portable type of tool capable of or other suitable liquidl As shown, a'leather applying a plurality of forces includin a cup-llis held in position by a retaining discgradual y variable pressure means an a 10 which in turn is securedfby a stud [12 means capable of" deliverin an intense threaded in the piston 3. initial impact and particular y effective to A thrust plun er is also disposed within y p free the arts andobtain the initial movethe other end 0 the cylindrical chamber 2 co ment oft e wheel or other object. one end of the thrust plunger is guid One of the objects of thisfinvention is to through an aperture in the head of the ,cas provide a puller or remover for freeing ing and is adapted to engage the shaft 4 or wheels, gears, or other ob'ects from the shafts other member. on'which the wheel or gear, on which they may be orcibly mounted or which is to be removed, is mounted. The ar- 08 pressed by providing a mechanism by which rangement of thepiston 3 and the thrust apowerful force may be gradually applied plunger' within the cylinder chamber ,2,- of v y a liquid compressor means, or an initial course, is such that the movementof the pisimpact of great intensity, or a series of such ton 3 may be directly transmitted to the q impacts, either independent ofthe pressure thrust plunger 4. v means, or in addition to such pressure means, transverse aperture 5 is formed in the may be employed to eifect the removal of the casing at a point intermediate its ends, and object from the shaft upon which it may be is adapted to receive a wedge or drift 6., the

mounted. v location of the aperture being such that the v' The further object is to provide a portable wedge may be driven between the piston 3 wheel uller of simple and rugged construc- .and the plunger 4. As" shown, one side oft1on w ich maybe conveniently handled. the aperture 5 is normal to the axisof the cyl-j Its further object is to rovide a portable -1I1de1 and. the other or lower s1de 8 of the wheel puller of the combination mechanoaperture is disposed at an angle sothat as 30 compressor type having means readily adaptthe wedge 6 is driven in the aperture,'moveing it for use on pullers of. various types and ment of the thrust plunger 4' may be effected sizes. s n One illustrative embodiment ofthe invenand without exerting any thrust or. force tion is shownin the accompanying drawing through the wedge upon the piston 3. By forthe purposes ofillustrating the principles such a disposition of parts, the entire thrust of the invention. forming impact force upon the wedge 6 is In the drawing: I exerted upon-the thrust plunger '4. How Fig. 1 is a sectional .view showing the re.- ever, the variable force from the pressure unit mover as includin the liquid compressor acting upon the piston 3, may beefi'ecti've U means, and the a ditional mechanical imupon the thrust plunger 4, directly (when the pact means. I I wedge 6 is not used), or indlrectly through Fig. 2 is a sectional view showing a modi-' the wedge 6 when the same is used. By such a r fied form of thrust lunger and casing in an arrangementand disposition of 'arts'the which the mechanica impact means for obvariable li uid pressure means an the me- 5 taining intense initial impact has been elimchanical initial impact means may be used inated. l either separately or in combination, to efiect', As shown in Fig. 1 of the drawin the the utilization of a force greater thanthat puller comprises a cylindrical casing 1 ormwhich either one independently is capable of mg a cylinder 2 and havinga p1St0I 13 there- 6X81l31h%. y p v in. The piston3 is disposed in one end of the The lquid pressure means for exerting a "9 to receive a ing cup to prevent loss of liquid and pressure.

The cylindrical in the head of suitable means;

stem 14 is remova ly fixed the cylinder casing by any as shown, the cylinder stem 14 is threaded in the head of the casing which the c linder chamber the drawing this means is shown as a nut is indicated at 15. r

The housing 13 is removably secured in fixed position at one end of the casing 13 by adjustable means on the cylindrical stem; in f the cylindrical stem 14 which extends through the apparatus 16 in the head 13' of the housing. The housing 13 when in position chamber or reservoir 26 about the cylindrical stem 14, and is adapted to contain a liquid such as oil, wateror other suitable liquid.

An intake passage 29 is provided in the cylindrical stem 14 to aflord communication between the reservoir 26 and the cylinder 14:; of spring actuated ball check valve 30 is shown for the intake passage, the arrangement being such that upon suction stroke of the piston rod 22, the intake passage will. be opened and the liquid will be drawn into the cylinder chamber 14' from the reservoir 26 An outlet passage 31 is provided to afiord an outlet passage between the cylinder chamber 14 and the cylinder chamber 2 of the casing; the usual type of spring actuated ball valve 32 is provide let passage, the arrangement being such that upon the suction stroke of the iston r 22 the passa-ge31 will be closed j ut upon the power stroke of the piston rod 22 the check valve 32 will be opened and the liquid will be forced under pressure to the cylindrical chamber 2 so that the force is transmitted to the piston 3 which in turn transmits the movement to the thrustplunger 4, either directly or through the wed An outlet for the cylindrical chamber 2 is provided by a passage 27 in the head of the cylinder casing 1, which passage connects 2 with the reservoir 26. A suitable valve 28 is provided for opening or closing the assage 27. The liquid in the cylinder cham er 2 ma be returned to the reservoir 26 through. t e passage 27 when the valve 28 is opened.

A suitable means may be provided for reciprocating the piston rod 22. As shown in the drawing this means includes an actuata: ,lni-nnl'mhle handle 23' 1 extending th 8 of a high While one d for the out i ,of the invention as I plunger in said c feet a and a link connection 24:, the link being pivotally connected at one end to the arms, link being pivotally connected at its other end to a bracket 25 which 'bracket'is mounte upon the cylinder casing.

Fig. 2 is a fragmentary view in section showing the cylinder casing 1 with the piston 3', therein, and with the end of the piston rough the opening at the end of the casing so that the piston also functions as the thrust plunger 4 as shown in Fig. 1 The modified form shows the relative arrangement of parts, when the tool is used without the impact'means, such as the wedge 6. A tool of the character described herein, having a plurality of means of forceavailable and effective in a wheel or gear puller is particularly desirable, ly'happens that the gear or frozen in positions so or the wheel is fixed that the application pressure gradually applied is not sufiicient for freeing the set or frozen parts; under such conditions, it is desirable to apply, in addition to the constant gradually applied or maintained high pressure, an additional pressure by impact which is equal to or greatly in excess of the constantly maintained pressure. By providing the wedge, which is interposed between the piston 3 and the thrust plunger 4 an intense pressure is applied by impact w ich is sufli the frozen parts. After the parts have-been freed by breaking the initial set, or frozen connection, the wed the gear or wheel removed by applying sufiicient'pressure through the piston. 3 to the lunger 4. a

selective embodiment of the invention has been shown for purposes of illustration, it is understood that various changes and modifications may be made without departing from the spirit and scope defined in the appended claims. e

What I therefore claim anddesire to secure by Letters Patent is:

1. A wheel puller comprising a cylinder casing, a piston in said cy plunger in said cylinder, means at one end of the casing for delivering a variable liquid pressure to the piston in said cylinder, to effect a gradually increasing pressure upon said thrust plunger, means arranged to permit the a plic'ation of an intense impactive force, in ependent of the pressure means upon the thrust plunger, said means includ ing a wedge adapted to be driven between the piston and said thrust plunger.

2. A wheel puller comprising a casing, a piston in said cylinder, a thrust linder, means at one end of the casing for elivering a variable liquid pressure to the piston in said cylinder, to eigradually increasing pressure upon said thrust plunger, means arranged to perge may be removed, and

linder, a thrust I cylinder v the 5 because it frequentcient' to free mit an initial force by impact to be delivered to the thrust plunger, said means includin a transverse aperture extending through the walls of the cylinder casing at a point be- 5 tween the piston and the thrust plunger, and a wedge or drift adapted to be driven said transverse aperture so as toeffee movement of the plunger without effectin movement of the piston. m n testimony whereof I aflix mg si ature.

ORGE W. GREBE SEIN. 

